package LeetCode.binTree_LeetCode;

public class Num572 {
    public boolean isSubtree(TreeNode root, TreeNode subRoot) {
        if(root == null && subRoot == null){
            return true;
        }
        if(root == null || subRoot == null){
            return false;
        }
        return isSameTree(root,subRoot) || isSubtree(root.left,subRoot) || isSubtree(root.right,subRoot);
    }
    public boolean isSameTree(TreeNode p, TreeNode q) {
        if(p == null && q == null){
            return true;
        }
        if(p == null || q == null){
            return false;
        }
        if(p.val != q.val){
            return false;
        }else{
            return isSameTree(p.left,q.left) && isSameTree(p.right,q.right);
        }
    }
}
